import { asyncRoutes, constantRoutes } from '@/router'
import store from '@/store'


/**
 * Use meta.role to determine if the current user has permission
 * @param roles
 * @param route
 */

function hasPermission(roles, route) {

  if (roles.indexOf(route.path) != -1){
    return  true;
  }

  return false
}

/**
 * Filter asynchronous routing tables by recursion
 * @param routes asyncRoutes
 * @param roles
 */
export function filterAsyncRoutes(routes, roles) {
  const res = []

  //  所有递归菜单遍历
  routes.forEach(route => {

    const tmp = { ...route }

    if (hasPermission(roles, tmp)) {
      if (tmp.children) {
        tmp.children = filterAsyncRoutes(tmp.children, roles)
      }
      res.push(tmp)
    }
  })

  return res
}

const state = {
  routes: [],
  addRoutes: []
}

const mutations = {
  SET_ROUTES: (state, routes) => {
    state.addRoutes = routes
    state.routes = constantRoutes.concat(routes)
  }
}

const actions = {

  generateRoutes({ commit }, roles) {
    return new Promise(resolve => {
      let accessedRoutes

      accessedRoutes = asyncRoutes || []
      // //  如果当前是超级用户admin，则返回全部
      if (store.getters.name == 'admin') {

        accessedRoutes = asyncRoutes || []
      } else {
        accessedRoutes = filterAsyncRoutes(asyncRoutes, roles)
      }
      commit('SET_ROUTES', accessedRoutes)
      resolve(accessedRoutes)
    })
  }
}

export default {
  namespaced: true,
  state,
  mutations,
  actions
}
